Annunciator



Aug. 2, BQEVE ET AL 2,477,857

ANNUNC'IATOR Filed Aug. 4, 1944 3 Sheets-Sheet l j Inventors (Zi/y @dez/e E] @mmm WWW Aug- 2, 1949- J. BoEvE Erm. y 2,477,857

ANNUNC I ATOR Filed Aug. 4, 1944 3 .Sheets-Sheet 2 Inventor:

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. 'By @Mm Mza/away M@ Aug 2, 1949. J. BoEvE ET AL 2,477,857

ANNUNCIATOR Filed Aug. 4, 1944 5 sheets-sheet 5 I nvenim/J Patented Aug.2, 1949 UNITED STATES PATENT Q'FFICE 2 Claims.

This invention appertains to new and useful improvements inannunciators, the principal object being to provide a horn or alarmcircuit for producing an audible signal for the purpose of orientatinghuntsmen or persons lost especially in forests.

Another important object of the invention is to provide an orientingannunciator especially intended for the purpose stated and which can beeasily installed on automobiles and elsewhere, Where electricity isavailable.

Other objects and advantages of the invention will become apparent tothe reader of the following description.

In the drawings:

Figure 1 represents a front elevational view of the annunciator.

Figure 2 is an inside rear elevational view, the rear cover beingremoved.

Figure 3 is a vertical sectional view through the device.

Figure 4 is a sectional View through the rotor.

Figure 5 is a fragmentary top plan view of the rotor.

Figure 6 is a diagrammatic View showing the electrical connectionbetween the electrical elements involved.

Referring to the drawings wherein like numerals designate like parts, itcan be seen that numeral 5 generally refers to a box-like structurehaving a top 6, a bottom I, side walls 8 and a front frame 9 in which awindow I0 is mounted, This box has a rear closure II hinged in place asat I2 and provided with a fastener I3.

Inside of the box, which can be mounted suitably on an automobile orother vehicle, is a clock I4, especially of the alarm clock type. Theclock is of conventional design and includes a shaft I5 performing onerevolution per hour which is used in conjunction with the presentinvention.

In carrying out the present invention a circumferentially grooved diskI6 of insulation is secured to the shaft I5 and radially through thisdisk and having its linear .or strip like ends exposed in thecircumferential groove thereof are conductor sections II arranged alonga diameter of the disk which the spring contact fingers I8, I9 canengage. A post anchors the contact finger I8, while the contact fingerI9 is carried by a post 2|.

Jumpers 22, 23 extend from the posts 20, 2| to a switch 24 mounted onthe upper portion of the box 5 and operative from the outside of thebox.

Numeral 25 denotes an electric horn, grounded at .one side and having aconductor 26 extending from the other side thereof to the post 20. A

source of current 2l has one side grounded and its other side connectedby a jumper 28 to the diametrical conductor sections I'I in the rotorI6.

It can now be seen, that when the switch 24 (see Figure 6) is open andthe apparatus is operating, when one end of the diametrical conductorsI'I engages the contact finger I8, current will be supplied from thebattery 2'I to the conductor 26 and horn 25, thus energizing the hornfor a few moments and this will be repeated every half hour, so long asthe switch 24 is open. However, in the event it is desired to offer morefrequent signals, the switch 24 is closed, thus bringing into use, thespring contact finger I9, so that alternately with the use .of thelinger I8, the finger I9 comes into play, engaging the ends of theconductor sections I'I with the result that current passes from thebattery 21 to the parts I'I and from there to the finger I9, jumper 23,switch 24, jumper 22, to the conductor 26.

While the foregoing specification sets forth the invention in specificterms, it is to be understood that numerous changes in the shape, sizeand materials may be resorted to without departing from the spirit andscope of the invention as claimed hereinafter.

Having described the invention, what is claimed as new is:

1. A device for producing a periodic audible signal of limited durationcomprising an electric horn, a clock mechanism provided with a timecontrolled minute shaft, a rotor disk of insulating material on saidshaft, provided with a radial bore, a contact piece in said bore with asubstantially linear conducting end surface, exposed on the periphery ofthe disk, a conductor leading to the conducting contact piece in saidradial bore, a source of current connected with said conductor, aplurality of contact fingers, sliding on the periphery of the aforesaidrotor disk for cooperation with the contact piece in the radial bore,said contact fingers being set for contact with the periphery of therotor disk at an angular distance less than a connection between one ofsaid contact fingers with the electric horn, and a connection betweensaid horn and source of current completing the circuit, whereby signalsof limited duration are produced, and a manually disconnectableconnection between the said linger and a further finger, having itspoint of contact on the rotor disk set at an angular distance from thefirst named linger, for changing the frequency of the audible hornsignal.

2. A device for producing periodic audible signals of limited duration,comprising an electric horn, a clock mechanism provided with a timecontrolled minute shaft, a rotor disk of insulating material on saidshaft, provided with a radial bore, a contact piece in said bore withsubstantially linear conducting surfaces, exposed on the periphery ofthe disk at diametrically opposed points, a conductor leading to theconducting contact piece in the radial bore, a source of currentconnected with said conductor, a contact nger sliding ,on the peripheryof the aforesaid rotor disk and cooperating with the substantiallylinear contact piece ends, a connection between said contact nger andsaid horn, at least one further contact finger, sliding on the peripheryof the said disk, said contact finger being in contact with theperiphery of said rotor disk at an angular distance from the contactpoint of the first named nger with said disk, said distance notexceeding an angle of 90, an electric .connection between said contactfingers, and a manually operated switch in said connection, an electric4 connection including the first mentioned contact finger, horn andsource of current, whereby signals of limited duration twice for everyfull rotation of the shaft at predetermined intervals are produced andthe closure of the switch in the connection between the fingersincreases the frequency ,of the signals emitted by the horn.

JOHN BOEVE.

JOHN STERENBERG.

REFERENCES CITED The following referenlces are of record in the le ofthis patent:

UNITED STATES PATENTS Name Date Tropp Aug. 20, 1907 Gaillard June 9,1908 Burleigh Oct. 9, 1923 Hobson Sept. 13, 1927 Jacobson Feb. 13, 1940Number

